Wrench



T. YOUNG.

WRENCH.

(No Model.) 7

No. 425,647. Patented Apr. 15, 1890.

gwwwto z e eeimwm/ attenuat UNITED STATES PATENT OFFICE.

THOMAS YOUNG, OF BRADFORD, PENNSYLVANIA.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 425,647 dated April 15, 1890.

Application filed June 25, 1889. Serial No. 315,513. (No model.)

To all whom it may concern:

Be it known that I, THOMAS YOUNG,a citizen of the United States, residing at Bradford, in the county of McKean, State of Pennsylvania, have invented certain new and useful 11nprovements in Wrenches, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to sliding-j aw wrenches in which the supporting-rods of said jaws are provided with serrations capable of being interlocked when clamped together; and the obj ects of my invention are to provide wrenches of this construction with means to advance the movable jaw toward the stationary jaw even after their serrations are interlocked together to permit a nut or other object to be clamped with this class of wrenches at least as firmly as with those having a screw-propelled jaw. I attain these objects by the construction. illustrated in the accompanying drawings, in which- Figure l is a perspective view of a wrench constructed in accordance with my invention. Fig. 2 is a longitudinal central section thereof. Fig. 3 is a transverse section of the wrench through the pivot of the eccentric lever. Fig. 4 is a perspective view of the retaining-rack removed from the rod of the stationary jaw.

In said drawings, A represents the stationary jaw upon one end of the rod A the opposite end of which is received into and attached by means of screws a to one side of the handle 13. lhe movable jaw O has a perforation for the passage of the rod A of the stationary jaw, and a stem 0 the end of which is received within the handle. To the inner surface of the stem 0 a rack c is attached or formed integral therewith, and to retain the rack-stem O and its jaw O in any desired position the rod A of the stationary jaw is provided with a rack d, that is located in a recess in the side of the rod A adjacent to the movable stem 0 so that the teeth of rack 0 can become interlocked wit-h the teeth of rack d when the eccentric head E of the lever F. has one of its bulging portions bearing against the face of the stem 0 with the end of said lever toward either up or down parallel with the stem 0 To cause the stem 0 and its jaw O to advance toward the jaw when its rack c is pressed in engagement with the rack d, the latter has its lower end beveled and rests upon the beveled end a of the recess formed in the rod A for the reception of the rack d. \Vhen the lever E is revolved and made to stand at a right angle to the stern G and its eccentric head I releases said stem, the rack d is pushed partly out of its recess by a spring d placed between its square upper end and the upper end of said recess, the beveled end of said rack sliding outwardly against the beveled. end a of the recess.

Lateral escapenient of the rack d is prevented by the cheek-pieces A projecting laterally from the j aw-rod A said cheek-pieces forming also the bearings for the journal-pin e of the eccentric lever. To facilitate the disengagement of the rack carried by the stem (J from the rack cl when the lever-cam releases it, said stein has normally a slight outward curvature nearly its whole length, and has resilience that is increased by the recessed form and curvature given to its lower end at 0 As the locking-lever E may not always occupy the position shown parallel with the handle when the jaws of the wrench are in close engagement with a nut, and it is often desirable to have no projections on the side of the wrench to revolve said nut and wrench rapidly, the latter is provided with jaws A and O at right angles to the jaws A and C, as clearly shown in Fig.1.

Having now fully described my invention, I claim In a wrench, the combination of its stationary jaw having in its rod A a recess beveled at one end, and in said recess a rack d, beveled at one end, and a spring upon its opposite end, with a movable jaw provided with a rack engaging said rack 61, and an eccentric head bearing against the stem of said movable jaw, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS YOUNG. Witnesses:

O. J. CURTIS, G. L. CASTERLINE. 

